Ritalin 20 mg is more effective than Ritalin 10mg. Instant work pill. It is prescribed Medication. It can take per day 20-30 mg. Excess use of this pill may cause different types of disease. Methylphenidate belongs to a class of stimulants. It can help to active your activity your body and pay attention etc. It can take to focus on your concentrate & give Better Output. The side effect of this pill is an allergic reaction, breathing problems, and tongue pain.